Khan leaves trainer Roach

London - British boxer Amir Khan has left his trainer Freddie Roach as he looks to revive his career after two losses over the last year.

Khan said in a Twitter post on Saturday that they "had a good professional chat and maybe in the future we work together."

Khan lost his WBC and WBA light-welterweight titles with a surprise fourth-round defeat to unheralded American Danny Garcia in July.

He had previously lost in a split decision to Lamont Peterson in a controversial fight with the American in December. A rematch was ordered but was canceled when Peterson tested positive for synthetic testosterone, restoring the WBA belt to Khan.

Roach has been Khan's trainer since 2008 and also looks after Manny Pacquiao and Julio Cesar Chavez jnr.